Deactivate your EIN. Limited Access Codes are being removed!On June 30, 2022, CDTFA stopped issuing Limited Access Codes for new business activity registrations. Download EIN Cancellation Letter. Using our online services, you can file a return, make a payment, submit a claim for refund, file an appeal and much more. The IRS asks that you send a letter, on company letterhead (if available) providing the name and Social Security Number of the owner(s) of the LLC. Revenue online is a secure web service, provding access to your tax account. See your account status. For Tax ID Number aka EIN and FEIN 450 Golden Gate Avenue, 1st Floor, San Francisco, CA 94102. Find out how to apply for an Individual Taxpayer Identification Number (ITIN) and use it to file your federal tax return.